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8/31/2019
Category: Mercedes
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Experience: Smog, Lead diagnostics, Mechanic at SpeeDee auto service
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Your fans should be on when the AC is on to push air over the AC condenser and cool the system.
Does the AC work when driving down the road? If it does then your issue is within the fans, or the control system for the fans.
If the AC does not work even when driving down the road then you most likely have a seperate issue.
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